Materials Literature
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The substrate temperature required for synthesis of graphene in an arc discharge plasma was studied. It was shown that an increase of copper substrate temperature up to the melting point leads to an increase in the amount of graphene production and the quality of graphene sheets. Favorable range of substrate temperatu…
High-pressure die-casting (HPDC) AZ91 tensile specimens were used to investigate characteristics of gas pores and their effects on mechanical properties of HPDC AZ91 magnesium (Mg) alloy. Combining the stereoscopic morphology of gas pores obtained from a three-dimensional (3D) reconstruction technique with the experim…
The effect of octylamine flow rate on the structure and morphology of CdSe quantum dots synthesized in a microreactor was studied. The flow rate of octylamine was varied from 0.005 ml/min to 0.030 ml/min, and the optical properties of the synthesized particles were analyzed by UV –vis and photoluminescence spectroscop…
A synthetic protocol has been designed to incorporate the DO3A ligand to the focal point of cationic or anionic carbosilane dendrons, affording a set of bifunctional chelating agents (BFCAs) useful for potential biomedical applications. The complexation behavior study of ionic BFCAs has been accomplished by UV-vis and…
Symmetrical dialkyl trithiocarbonates were readily synthesized in excellent yields by one-step reaction of carbon disulfide and various alkyl halides under mild reaction conditions in the presence of cesium hydroxide as a super basic system. This method provides a synthesis of symmetrical dialkyl trithiocarbonates in…
In this paper, we first synthesized a novel disulfide-coupled bis-(cyclic carbonate) (TDCSS) monomer. After ring-opening co-polymerization (ROP) of TDCSS and trimethylene carbonate (TMC) initiated by mono-methoxyl poly(ethylene glycol), the crosslinked reduction-sensitive copolymer PEG-P(TMC-co-TDCSS) was obtained via…
Due to the rapidly increasing demand of electric power, insulating materials used in electrical components are pushed up to their limits, where their electronic properties are of fundamental importance. Electroluminescence provides an elegant way to investigate electronic properties, high field effects and electrical…
A laboratory experiment is described that introduces second-year undergraduate organic chemistry students to organic electronic materials. The discovery of metallic conductivity in the charge transfer salt tetrathiafulvalene tetracyanoquinodimethane (TTF–TCNQ) is a landmark result in the history of organic electronics…
Recently, semiconducting monolayers, such as MoS2and WSe2, have been highlighted for their spin-valley coupling, diverse band structures, bendability, and excellent optoelectronic performances. With a subnanometer thickness of atomic layers, the transition metal dichalcogenides (TMDc) atomic layers demonstrate a signi…
We report on an elastic neutron scattering study of the charge correlations in La2–xSrx CoO4 with x = 1/3, 0.4 and 0.5. We found that the checkerboard charge ordering correlations present in the x = 0.5 sample persist in the x = 0.4 and 1/3 materials. These checkerboard charge ordering correlations are robust and expl…
The dielectric relaxation in three glass-forming molecular liquids, 1-methylindole (1MID), 5H-5-Methyl-6,7-dihydrocyclopentapyrazine (MDCP), and Quinaldine (QN) is studied focusing on the secondary relaxation and its relation to the structural α-relaxation. All three glass-formers are rigid and more or less planar mol…
The elastic properties of ferromagnetic Fe1−x−yMnyAlx (0 ≤ x ≤ 0.5, y = 0, 0.1, and 0.2) random solid solutions in the body-centered cubic (bcc) crystallographic phase have been investigated using the ab initio exact muffin-tin orbitals method in combination with the coherent-potential approximation. Comparison with t…
To study the effect of annealing on electromagnetic performance, spherical cobalt particles were synthesized through a simple liquid reduction method, and then the cobalt particles were annealed at 600 °C for 1 h. The effects of annealing and mass ratios on the electromagnetic performance and microwave absorption prop…
The mechanism of forming orthogonally oriented hexagonal close-packed (o-HCP) mesostructures during aging of surfactant-templated titania thin films is elucidated using in situ grazing incidence small-angle X-ray scattering (GISAXS) in a controlled-environment chamber. To promote orthogonal orientation, glass slides a…
Comparative studies between response surface methodology (RSM) and artificial neural network (ANN) methods to find the effects of electrospinning parameters on the porosity of nanofiber mats is described. The four important electrospinning parameters studied included solution concentration (wt.%), applied voltage (kV)…
Abstract Dehydrocoupling reactions between the boranes HBpin and 9‐borabicyclo[3.3.1]nonane and a range of amines and anilines ensue under very mild reaction conditions in the presence of a simple β‐diketiminato magnesium n‐butyl precatalyst. The facility of the reactions is suggested to be a function of the Lewis aci…
Commercial Ce3+ doped yttrium aluminum (Ce3+:YAG) and lutetium aluminum garnet (Ce3+:LuAG) powders were mixed with powdered soda-lime silicate glass with the molar composition 15.5 Na2O / 10.7 CaO / 73.8 SiO2. Then the mixtures were sintered at temperatures in the range from 800 to 1000 °C for 10 and 30 min. XRD-patte…
The temperature distribution in copper and martensitic steel spheres has been investigated for the initial stage of field‐activated sintering (FAST)/spark plasma sintering (SPS) using capacitor discharges (CD) with applied voltages from one to 15 V as model experiments. At first, the evolution of the contact resistanc…
We have performed a molecular dynamics study on the growth of helium (He) clusters in the subsurface of tungsten (W) (1 0 0) at 300 K, focusing on the role of cluster depth. Irregular 'stick-slip' behavior exhibited during the evolution of the He cluster growth is identified, which is due to the combined effects of th…
We demonstrate here guided mode resonance (GMR) concentric circular grating filters (CCGFs) on an HfO2-on-silicon platform. The fabricated devices are realized with a membrane structure by completely removing the silicon substrate beneath the HfO2device layer and, thus, can operate across the entire visible wavelength…